MySQL使用C++連結語法
連線、建立資料表及插入資料
Update the relevant include and lib directories in Visual Studio Community 2017
a. C:\Program Files\MySQL\Connector C++ 1.1\include
b. C:\Program Files\MySQL\MySQL Server 8.0\include
c. C:\Program Files\MySQL\Connector C++ 1.1\lib\opt
d. C:\Program Files\MySQL\MySQL Server 8.0\lib
e. mysqlcppconn.lib
f. libmysql.lib
#include <stdlib.h>
#include <iostream>
#include "stdafx.h"
#include "mysql_connection.h"
#include <cppconn/driver.h>
#include <cppconn/exception.h>
#include <cppconn/prepared_statement.h>
using namespace std;
//for demonstration only. never save your password in the code!
const string server = "tcp://yourservername.mysql.database.azure.com:3306";
const string username = "username@servername";
const string password = "yourpassword";
int main()
{
sql::Driver *driver;
sql::Connection *con;
sql::Statement *stmt;
sql::PreparedStatement *pstmt;
try
{
driver = get_driver_instance();
con = driver->connect(server, username, password);
}
catch (sql::SQLException e)
{
cout << "Could not connect to server. Error message: " << e.what() << endl;
system("pause");
exit(1);
}
//please create database "quickstartdb" ahead of time
con->setSchema("quickstartdb");
stmt = con->createStatement();
stmt->execute("DROP TABLE IF EXISTS inventory");
cout << "Finished dropping table (if existed)" << endl;
stmt->execute("CREATE TABLE inventory (id serial PRIMARY KEY, name VARCHAR(50), quantity INTEGER);");
cout << "Finished creating table" << endl;
delete stmt;
pstmt = con->prepareStatement("INSERT INTO inventory(name, quantity) VALUES(?,?)");
pstmt->setString(1, "banana");
pstmt->setInt(2, 150);
pstmt->execute();
cout << "One row inserted." << endl;
pstmt->setString(1, "orange");
pstmt->setInt(2, 154);
pstmt->execute();
cout << "One row inserted." << endl;
pstmt->setString(1, "apple");
pstmt->setInt(2, 100);
pstmt->execute();
cout << "One row inserted." << endl;
delete pstmt;
delete con;
system("pause");
return 0;
}讀取資料
#include <stdlib.h>
#include <iostream>
#include "stdafx.h"
#include "mysql_connection.h"
#include <cppconn/driver.h>
#include <cppconn/exception.h>
#include <cppconn/resultset.h>
#include <cppconn/prepared_statement.h>
using namespace std;
//for demonstration only. never save your password in the code!
const string server = "tcp://yourservername.mysql.database.azure.com:3306";
const string username = "username@servername";
const string password = "yourpassword";
int main()
{
sql::Driver *driver;
sql::Connection *con;
sql::PreparedStatement *pstmt;
sql::ResultSet *result;
try
{
driver = get_driver_instance();
//for demonstration only. never save password in the code!
con = driver->connect(server, username, password);
}
catch (sql::SQLException e)
{
cout << "Could not connect to server. Error message: " << e.what() << endl;
system("pause");
exit(1);
}
con->setSchema("quickstartdb");
//select
pstmt = con->prepareStatement("SELECT * FROM inventory;");
result = pstmt->executeQuery();
while (result->next())
printf("Reading from table=(%d, %s, %d)\n", result->getInt(1), result->getString(2).c_str(), result->getInt(3));
delete result;
delete pstmt;
delete con;
system("pause");
return 0;
}更新資料
#include <stdlib.h>
#include <iostream>
#include "stdafx.h"
#include "mysql_connection.h"
#include <cppconn/driver.h>
#include <cppconn/exception.h>
#include <cppconn/resultset.h>
#include <cppconn/prepared_statement.h>
using namespace std;
//for demonstration only. never save your password in the code!
const string server = "tcp://yourservername.mysql.database.azure.com:3306";
const string username = "username@servername";
const string password = "yourpassword";
int main()
{
sql::Driver *driver;
sql::Connection *con;
sql::PreparedStatement *pstmt;
try
{
driver = get_driver_instance();
//for demonstration only. never save password in the code!
con = driver->connect(server, username, password);
}
catch (sql::SQLException e)
{
cout << "Could not connect to server. Error message: " << e.what() << endl;
system("pause");
exit(1);
}
con->setSchema("quickstartdb");
//update
pstmt = con->prepareStatement("UPDATE inventory SET quantity = ? WHERE name = ?");
pstmt->setInt(1, 200);
pstmt->setString(2, "banana");
pstmt->executeQuery();
printf("Row updated\n");
delete con;
delete pstmt;
system("pause");
return 0;
}刪除資料
#include <stdlib.h>
#include <iostream>
#include "stdafx.h"
#include "mysql_connection.h"
#include <cppconn/driver.h>
#include <cppconn/exception.h>
#include <cppconn/resultset.h>
#include <cppconn/prepared_statement.h>
using namespace std;
//for demonstration only. never save your password in the code!
const string server = "tcp://yourservername.mysql.database.azure.com:3306";
const string username = "username@servername";
const string password = "yourpassword";
int main()
{
sql::Driver *driver;
sql::Connection *con;
sql::PreparedStatement *pstmt;
sql::ResultSet *result;
try
{
driver = get_driver_instance();
//for demonstration only. never save password in the code!
con = driver->connect(server, username, password);
}
catch (sql::SQLException e)
{
cout << "Could not connect to server. Error message: " << e.what() << endl;
system("pause");
exit(1);
}
con->setSchema("quickstartdb");
//delete
pstmt = con->prepareStatement("DELETE FROM inventory WHERE name = ?");
pstmt->setString(1, "orange");
result = pstmt->executeQuery();
printf("Row deleted\n");
delete pstmt;
delete con;
delete result;
system("pause");
return 0;
}
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